Linux Hanged 1

1. Use TTY to Regain Control (Very Useful)
Even if the GUI is frozen, Linux still runs in the background. You can switch to a TTY (text console):

👉 Press:

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Ctrl + Alt + F2  (or F3, F4... up to F6)
This brings you to a black screen asking for login. Log in with your username and password, then:

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htop
Or use:

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top
Find the highest CPU or memory usage process, and kill it:

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kill -9 <PID>
If you don’t have htop yet:

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sudo apt install htop
To return to the desktop GUI after killing the offending process:

👉 Press:

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Ctrl + Alt + F1  (or sometimes F7, depending on distro)
🔹 2. Hard Reset as Last Resort
If TTY doesn't work (rare but possible), you can force a system reboot safely:

👉 Press:

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Alt + SysRq + REISUB
That’s:

Alt + Print Screen (SysRq key) + type R E I S U B slowly.

It safely unmounts disks and reboots — better than holding the power button.

⚙️ How to Prevent Future Freezing
🔸 Check What’s Eating Resources
Use htop or gnome-system-monitor to watch:

Which apps use most RAM or CPU.

How much swap is used — if your system runs out of RAM and swap, it freezes.

🔸 Add Swap Space (Highly Recommended)
If your system has <4 GB RAM, freezing is likely due to no memory left.

To check if you have swap:

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free -h
If swap is 0, add it:

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sudo fallocate -l 2G /swapfile
sudo chmod 600 /swapfile
sudo mkswap /swapfile
sudo swapon /swapfile
To make it permanent:

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echo '/swapfile none swap sw 0 0' | sudo tee -a /etc/fstab
🧠 Pro Tip: Background Services
Kali runs some pentesting tools/services automatically. Disable them unless needed:

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sudo systemctl disable postgresql
sudo systemctl disable apache2
sudo systemctl disable metasploit
✅ Summary
Problem    Fix
System freezes    Use TTY (Ctrl+Alt+F2), then kill heavy process
No task manager    Install htop, use from terminal or TTY
RAM overload    Add swap (especially if <4GB RAM)
Background tools    Disable with systemctl disable

Let me know your system specs (RAM, CPU), and I’ll help you optimize even further.

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